Telegram's API and file servers resolve to IPs in the 198.18.0.0/15
range (RFC 2544 benchmarking range). The SSRF filter was blocking these
addresses because ipaddr.js classifies them as 'reserved', and the
filter also had an explicit RFC2544_BENCHMARK_PREFIX check that blocked
them unconditionally.
Fix: exempt 198.18.0.0/15 from the 'reserved' range block in
isBlockedSpecialUseIpv4Address(). Other 'reserved' ranges (TEST-NET-2,
TEST-NET-3, documentation prefixes) remain blocked. The explicit
RFC2544_BENCHMARK_PREFIX check is repurposed as the exemption guard.
Closes#24973
Add optional urlAllowlist config at tools.web level that restricts which
URLs can be accessed by web tools:
- Config types (types.tools.ts): Add urlAllowlist?: string[] to tools.web
- Zod schema: Add urlAllowlist field to ToolsWebSchema
- Schema help: Add help text for the new config fields
- web_search: Filter Brave search results by allowlist (provider=brave)
- web_fetch: Block URLs not matching allowlist before fetching
- ssrf.ts: Export normalizeHostnameAllowlist and matchesHostnameAllowlist
URL matching supports:
- Exact domain match (example.com)
- Wildcard patterns (*.github.com)
When urlAllowlist is not configured, all URLs are allowed (backwards compatible).
Tests: Add web-tools.url-allowlist.test.ts with 23 tests covering:
- URL allowlist resolution from config
- Wildcard pattern matching
- web_fetch error response format
- Brave search result filtering
